10 Key to the System of 



Petals absent. 



Stipules none ; leaves always simple and quite entire ; calyx 

 corollaceous, its lobes overlapping before expansion ; 

 stamens definite, two or more, inserted on the calyx-tube ; 

 style one, often almost lateral ; stigma one ; fruit usually 

 simple, indehiscent, only adnate at the base, but enclosed ; 

 seed solitary, pendent. Figure 74. Thymeleae. 241 



48. Fruit often consisting of separate fruitlets, each with 



an almost lateral style ... ... ... 49 



Fruit consolidated or consisting of connate or coherent 

 fruitlets 50 



49. Stamens mostly indefinite in number. 



Stipules usually present ; leaves either simple or compound, 

 often indented or denticulated, of thin texture and with- 

 out pellucid dots ; leafstalks not rarely dilated ; lobes of 

 the calyx overlapping before expansion ; petals sometimes 

 absent; styles usually more than one, disconnected; ovules 

 generally two in each cell ; albument mostly absent. 

 Figure 52. Rosaceae. 242 



Stamens mostly definite in number. 



Petals sometimes absent ; stamens usually twice as many as 

 petals or calyx-lobes ; fruit usually compound, forming 

 mostly distinct or coherent fruitlets, often only at or 

 towards the base adnate; seeds generally several or 

 many; albument mostly present. (IncludingCrassulaceae). 

 Figures 53 and 54. Saxifrageae. 247 



50. Stamens usually indefinite in number. 



Woody plants from dwarf to tall ; leaves transparently 

 dotted, always entire, often of firm texture ; stipules 

 absent; lobes of the calyx overlapping or open before 

 expansion or forming a lid ; petals often five, not rarely 

 absent ; style one ; stigma undivided ; fruit high-adnate 

 to the calyx ; seeds without albument. Figures 56 to 60. 



Myrtaceae. 249 



Stamens usually definite in number ... ... ... 51 



51. Style nearly always one ... ... ... 52 



Style nearly always more than one ... ... ... 55 



52. Stamens twice as many as petals or calyx-lobes ... 53 

 Stamens as many as petals or calyx-lobes ... ... 54 



